Compasses



P. B. BUCH. COMPASS'ES.

v H APPLICATION FILED'APR- 1 1918- I 1,334,556. Patented Mar. 23, 1920.

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Invent-Inf @zzz/a firm UNITED STATES PATENT ourron.

PETER B. BITCH, OFCUMBEBLAND, MARYLAND.

conrassns. t j i i Specification of Letters Patent.

Patented Mar. 23, 1920.

Application filed April 1, 1918. Serial No. 226,048.

To allwhom it may concern:

Be it known that I, Pnrnn B. HUGH, a cltizen of the Unlted States, resldlng at Cumberland, county of Allegany, and State compasses, and particularly to that class of compasses which may be attached to a pen, pencil, or other marking lnstrument, and in which themarlnng instrument ltself forms one leg of the compass.

One ob ect of my invention is to providefor a compass which may he formed from, and consists of, a single piece of material, preferably round or fiat wire. Another object is to provide a relatively large friction hearing on which the marking instrument is mounted, to facilitate in maintaining adjustments. j

I attain these objects by the means set forth in the accompanying drawing in which:

Figure 1 is a front elevation. showing one form of my improvement applied to a lead pencil.

Fig. 2 is a similar view of a modified form of device.

Referring more specifically to the drawing and particularly Fig. 1, A indicates a pencil or n'larking instrument to which my in'lprovement is to be attached. In carrying out my conception which is susceptible of expression in a variety of forms, I prefer to fashion the device from a single piece of round or flat wire which is bent first into generally circular open ring form the circumference of which, forms the bearing por tion B for a n'iarking instrument to lie against and movable along one face thereof;

the wire is then bent inwardly and radially at one end of the open ring structure forming a retaining bar C which in form shown in Fig. 1 extends diametrically across the ring i'ncmher to the outer circumference, and there given a slight bend continuing substantially tangentially as a leg D, the lower end of which is heat slightly inwardly and pointed, that it may constitute the pivot in which the leg of the compass may swing.

The bearing or retaining haris provided with an offs... positioned at :pprinzimatcly the generating l or bent part in whicl'i will he center of the circle, this offset acting as a seat and slideway for the marking instrument.

As the device is fashioned from wire preferably having more or less inherent resiliency or elasticity when bent into desired shape, it will be understood, the tendcncy of the bar U will be to spring inwardly into the fiat plane of the ring. As the circumference limits this spring action it will he perfectly obvious that a pencil or marking instrument placed as shown. in Fig. 1 lying against the circumference and having the bar 0 extending diametrically across and over the pencil, that it will be held wherever it may he slid the offset providing a seat for the pencil and also a slideway for same, so that it may be adjusted as the pencil. wears at its point. The wire is preferaloly flat, atleast on one side, the contact side where the pencil lies against, as this will give greater bearing surface against the pencil.

In the form illustrated in Fig. 2 the essential elements of the device are present but the relative arrangement is somewhat modi- :fied as in this form the bearing bar C does not extend entirely across the ring but only slightly beyond the center in one direction; the offset portion however is located at the approximate center of the ring while the circumference itself is prolonged tangentially to form the leg D, as clearly shown in Fig. 2. The action of the bar with the offset is to hold the pencil against the ring in whatever position it may be put.

The various sizes of circles can be drawn with these compasses as the attachment can he slid along on the pencil and the pencil then oscillated with the offset as a center, to practically any angle desired.

The elasticity or resiliency of the wire is such the portions B and C impinge upon the pencil sufiiciently to maintain adjustments of the leg D to and from the pencil A and of the ring frame longitudinally of the pencil. a

ation of the hearing or circumferential portion.

When the compass is made of round wire,

the side of the portion B next to the pencil should be slightly flattened to give greater surface in contact'with the pencil.

' Fig. 1 shows the leg portion as a continuation of the holding portion C, While Fig. 2

shows the leg portion as a continuation of the bearing portlon B. The essential features of the device may be embodied in other forms also, and I donot Wish to restrict my invention to these forms alone.

I claim: v

1. A device as herein characterized comprising a ringlike structure having a flat circular bearing member, a pencil holding member and a leg member respectively disposed radially and angularly relative to the circular bearing member.

A'device as herein characterized consisting of a flat circular marking instrument bearing member, a marking instrument holdng member disposed radially upon said {bearingrelative to the circumference thereof,

said-radially disposed member ofiset to receive and hold such marking instrument against the bearing member, and a leg portion disposed 'angularly relative to said bearing member. 7 Y

compass leg extending from said holding portion.

a 4. A device of the class described comprising a flat bearing portion, a marking inlie andmaintain the marking instrument in position on the bearing portion, and a portion extending from the holding portion forming a compass leg.

5. In a device of the class described, the combination with a compass leg, a ring shaped instrumcut-bearing portion, a radial holding portion opposed to said bearing portion and having one of its ends springing from said bearing portion.

6. In a device of the class described, the combination with a lead pencil, of a single piece of Wire so formed as to constitute a compass leg and having a circular bearing portion, a radial holding portion opposed to said bearing portion and adapted to maintain the lead pencil in position on said bearing portion.

7 A device as herein characterized comprising a single piece of resilient Wire bent to form an extending leg member, a ring structure, and a cross-bar disposed diametrically upon said ring structure.

8. A device as herein characterized, comprising a single piece of wire bent to form an open ring structure, the circumferential portion constituting a bearing member for a marking instrument, a radial cross bar having an offset portion and sprung toward the plane of the ring, and a leg member extending angularly from the cross-bar.

PETER B. RUCI-I. 

